This is what reality TV should be about. Unfortunately there is just so much junk around.
In this show people live for 30 days in a lifestyle very different to their own. Such as being a muslim, or being on a binge. There is usually a shock to the culture initially, but eventually the adapt.
Morgan Spurlock's doco Super size me had him eating nothing but Mcdonalds and the effect that had on him really has to be seen to believed. This is like a follow on from that except it's spread much further that fast food.